text: #include<stdio.h>
  int main()
  {
  int ans;
  	do{
  		printf("Menu\n***********\n");
  		printf("0-exit\n");
  		printf("1-area\n");
  		printf("2-temp\n");
  		printf("Please choose your ans:  ");
  		scanf("%d",&ans);
  
  		switch(ans)
  		{
  			case 0: 
  			case 1:
  			case 2:
  			case 3:
  			default:
  		}
  	}while();
  
  return 0;
  }
  